Entity Tax Identification Number Entity Address, Address Line Two Securities Act File Number Title of 12(b) Security Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Soliciting Material Entity Address, Address Line One Entity Address, Postal Zip Code Registrant Name Entity Address, State or Province Entity Incorporation, State or Country Code Written Communications Trading Symbol City Area Code Document Information [Table] Document Period End Date Long-Term Debt Long-Term Debt [Text Block] Amendment Flag Pre-commencement Issuer Tender Offer Entity Address, City or Town 6.25% Notes due 2033 Six Point Two Five Notes Due Two Thousand Thirty Three [Member] Six Point Two Five Notes Due Two Thousand Thirty Three Security Exchange Name Common Stock, par value $0.001 per share Common Stock Par Value Zero Point Zero Zero One Per Share [Member] Common Stock Par Value Zero Point Zero Zero One Per Share Document Information [Line Items] Document Type Class of Stock [Axis] Pre-commencement Tender Offer Central Index Key Entity Emerging Growth Company